1. The problem statement, all variables and given/known data The problem is hopefully attached, I had to take a screen shot. 2. Relevant equations I understand the process of taking the derivative of position to get velocity. *refer to derivative rules.... for example r(x)=2x^2-6x+8 therefore r`(x)=4x-6 3. The attempt at a solution I am stuck with what to do with the "1/s" The correct answer is 2.8m/s Thank you so much in advance.